Rare earth (RE) elements (scandium, yttrium, and the lanthanides) are critical for their role in sustainable energy technologies. Problems with their supply chain have motivated research to improve separations methods to recycle these elements from end of life technology. Toward this goal, we report the synthesis and characterization of the ligand tris[(1-hydroxy-2-oxo-1,2-dihydropyridine-3-carboxamido)ethyl]amine, H₃1·TFA (TFA = trifluoroacetic acid), and complexes 1·RE (RE = La, Nd, Dy). A high-throughput experimentation (HTE) screen was developed to quantitatively determine the precipitation of 1·RE as a function of pH as well as equivalents of H₃1·TFA. This method rapidly determines optimal conditions for the separation of RE mixtures, while minimizing materials consumption. The HTE-predicted conditions are used to achieve the lab-scale separation of Nd/Dy (SF_Nd/Dy = 213 ± 34) and La/Nd (SF_La/Nd = 16.2 ± 0.2) mixtures in acidic aqueous media.

稀土 (RE) 元素（钪、钇和镧系元素）对于它们在可持续能源技术中的作用至关重要。他们的供应链问题促使研究改进分离方法，以从报废技术中回收这些元素。为了实现这一目标，我们报告了配体三[(1-羟基-2-氧代-1,2-二氢吡啶-3-甲酰胺)乙基]胺、H ₃ 1·TFA（TFA = 三氟乙酸）的合成和表征，和络合物 1·RE（RE = La、Nd、Dy）。开发了高通量实验 (HTE) 筛选以定量确定 1·RE 的沉淀作为 pH 值的函数以及 H _3的当量1·三氟乙酸。该方法可快速确定稀土混合物分离的最佳条件，同时最大限度地减少材料消耗。HTE 预测的条件用于 在酸性水介质中实现 Nd/Dy（ SF _Nd/Dy  = 213 ± 34）和 La/Nd（SF _{La/Nd = 16.2 ± 0.2）混合物的实验室规模分离。}